Double-drum hoist



June 30, 19251 1,543,856

E. B. LEAR DOUBLE DRUM HOIST Filed March 18 v 1924 INVENTOR Earl B.Leav.

76W m5 ATT NEY Patented June 38, 19.25.

a I i UNITED STATES PATENT EARL B. LEAR, OF PHILLIPSBURG, NEW JERSEY,ASSIGNOR TO INGER-SOLL-BAND COMPANY, OF JERSEY CITY, NEJV JERSEY, ACORPORATION OF NEW JERSEY.

DOUBLE-DRUM HOIST.

Application filed March 18, 1924. Serial No. 699,988.

secured to the cylinder by the cap bolts H and fluid pressure, as forinstance compressed air, is supplied to the motor through the inlet ,Jcontrolled by a suitable valve K in the valve chest L, and manipulatedby the valve lever O. In this instance, the motor is assumed to be areversible motor,

To all whom it may concern:

Be it known that I, EARL B. LEAR, a citizen of the United States, and aresident of Phillipsburg, county of Warren, and State of New Jersey,have invented a certain Double-Drum Hoist, of which the following is aspecification accompanied by drawings. 7

This invention relates to hoists but more particularly to an improvedclutch mechanism for a power driven hoist of the double drum type, inwhich either drum may be driven from a common driving shaft.

In some respects, this invention is an improvement on the double drumhoist de scribed and claimed in United States Patent No. 1,421,183,granted to Jesse Ditson on June 27, 1922. By means of this invention,the clutch mechanism is moved to drive one or the other of'the drums, inaccordance with the direction of rotationof the driving shaft.

The objects of this invention are to produce an improved clutchmechanism for double drum hoists, so as to insure the engagement of theclutch mechanism with one or the other of the drums, in accordance withthe direction of rotation of the driving shaft.

Further objects of the invention will hereinafter appearand to theseends the invention consists of the hoist described and claimed in thisspecification, and shown in one of its preferred forms in theaccompanying drawings, in which Figure 1 is a longitudinal sectionalelevation of the double drum hoist,

Figure 2 is a transverse section taken on the line 2 2 of Figure 1looking in the direction of the arrows, and, I

Figure 3 is a perspective view of the pawl and guide member.

Referring to the drawings, the base plate A on which the hoist'ismounted is provided with a clamping-member preferably in the form of asaddle member B having clamping bolts C for securing the hoist to acolumn, cross bar, or other support. Any suitable motor may be providedfor the hoist, and in this iinstance,'a' fluid pressure motor isindicated comprising the cylinder D mounted on the frame E suitablysecured to the base plate A. cylinder head G is device N may be providedates throughout in ball 7 bearing Q the reversal of which is controlledbya valve lever 0. .An oiling device P of any suitable type may beapplied to the motor. v A center bearing Q, shown in this instance inthe form of a shell, havinga tubular body and a flanged portion R, isconnected to the motor cylinder D and the cylinder. head G by means ofcap bolts H. The opposite end of the center bearing is supported in thegear. boXS, which is secured to the base plate A in any suitable manner.A center bearing retaining screw U suitably secures the center bearingto the inner wall V of the gear box S. An oiling upon the gear box andthe gear box cover X is secured to the gear box S by means of bolts Y.The construction of the motor and frame so far described forms a simpleand compact frame for the hoist, easily assembled and dis-as sembled andpermitting ready accessibility to the operative parts of the hoist. Amain driving shaft a passing centrally through the center bearing Q issupported in the ball bearings b and c and provided with a crank .disc0? having the crank pin 6 connected to the piston f of the motor, bymeans of ball bearings 9, so that the driving shaft a operbearings.

A driving pinion h is keyed to the driving shaft a and a retainingwasher j is held against the driving pinion by means of a pin 70. Thedriving pinion 72. meshes with an intermediate gear 0 keyed to thecounter shaft ;0 operating in the ball bearings and 1" mounted in thegear box S. An intermediate pinion s on the counter shaft p meshes withthe internal gear 2, of the main driver a, adapted to rotate on thecenter from which power is taken for driving either, one of the twodrums.

A haulage drum 1) to which one length of the rope w is adapted to beconnected, rotates on the center bearing Q and the concentric tail ropedrum w to which the tail rope is connected, preferably rotates upon thehaulage drum 4).

. driving shaft 61;.

Such construction of concentric drums materially reduces the overalllength of thevhoist, and produces amore compact and better balancedhoist than heretofore.

Means are provided for automatically connecting the main driver u to oneor the other of the drums o and m in accordance with the direction ofrotation of the driving shaft or, and for this purpose, .the haulagedrum c is provided'with a driver 2 preferably in the form of a ring,having clutch members in the form of teeth 2 merging into cam surfaces3. The driver a is suitably secured to the haulage drum 1) by means ofthe bolts 1 and for convenience of description may be termed the innerdriver.

The tail rope drum a" is likewise provided with a driver 5 preferably inthe form'of a ring, having clutch members in the form of teeth 6 facingin the opposite direction from the teeth 2 on the driver a and merginginto the cam surfaces The driver 5 is secured to the tail rope drum mbymeans of bolts 8 and for convenience of description may be The spacedteeth 2 :and 6 of each series on the opposed drivers, preferably extendradially .or in the plane of the respective driver on which they areformed.

The terms inner and outer, as applied to the opposed drivers 2 and 5carried by the drums respectively, are not to be understood asnecessarily limiting the ratchet ring concentric with the axis ofrotation of the machine, but are intended to be used as suitabledesignations for two opposed ratchet faces for the drums,

having reference to some fixed point of the machine, which obviouslyneed not be the driving shaft.

The main driver to is provided with a movable clutch member 9,preferably in the form of a pawl slidable between the lugs 10projectinginwardly from the main driver a to a position between theinner driver a and the outer driver- 5, so that the pawl 9 may engagethe inner or outer driver, in accordance with the direction of rotation.of the driving shaft a. I

The pawl 9 as shown, carried wholly bythe main driver a and is mountedupon the body portion of the main driver at a point rearward or at asubstantial distance in a radial direction from the The main driver a isrotated in fixed longitudinal relationship to the drums, while the pawl9 is automatically movable or adjustable relatively to the main driverand to the drums. I V J y In order to insure the movement of the pawl 9,relatively to the drum drivers 2 and 5, guiding means in this instancein the form of an annular plate or ring 11, is located betweenthemaindriver a and thetail rope drum 00. An annular flange 12 is formedpreferably formed with termed. the outer driver.

is separate from but in the ring 11 and surrounds the haulage drum 1)asindicated in Figure 1. Thatail rope drum a; preferably surrounds theflange 12 and in'this instance a diagonal slot 13 is formed onthe ring11.

:a pin 14: which is guided in the slot 18.

' In the operation of the hoist, if it be assumed that the driving'shafta is rotated in the direction of the arrow 15, in Figure 2, the maindriver a will be rotated by the train of gearing described, in theopposite direction, and the pawl 9 will have been moved into engagementwith one of the teeth 2 on the inner driver .2 thus driving} the haulagedrum '2) in the direction of the arrow 15. The means for moving the pawl9 into engagement withthe tooth 2 on the driver 2, is the pinl i, whichcooperates with the diagonal slot 18 in the guide ring 11. The tail ropedru-m m is disconnected fromthe driving shaft a, but is freely rotatedinthe same direction the haulagefdrum a, because the rope y is unwindingfrom the tail rope drum. 7

Upon reversing the direction of rotation of the driving shaft a, thedirection of rotation of themain driver it will be reversed and the pin14 carried by the pawl 9 will move in the slot 13 in the guide ring 11so as to engage a tooth 6 on the 'outer'driver 5,

thus driving the tail rope drum m oppositely to the direction ofrotation of the driving shaft (1. In such case, the haulage drum '0 willbe freely rotated in the same direction as the tail rope drum m, as therope w is unwound from the haulage drum.

The annular flange 12 on the guidering 11 creates friction between thetail rope drum in and the haulage drum '0, and holds the guide ring 11stationary momentarily upon'the reversal-of the direction of rota- :tionof the driving shaft w, to cause the pin 1 1 on the pawl 9 to move inone direction or the other in the slot 13 in the ring 11 to engage atooth .on one or the other of the drum drivers and 5. Upon engagement ofthe pawl 9 with a tooth on one or the other of the drum drivers 2 and 5,the guide rin ll rotates with the driven drum. 1

In a hoist of the character described, a brake preferably provided forone of the drums, it being unnecessary to provide a brake for both drumsin accordance with my construction. In this instance, the tail rope drummay be conveniently provided with a flange 16 to which a brake band17l1aving a suitable lining 18 is appliedf- A brake lever 19 isfulcrumed at 20 on the lugs 21 and is connected to the ends of the brakeband 17. By manipulating the lever 19 the brake will be tightened by thefriction between the flange 16 on the tail rope drum :0 and thebrakelining 18 and in this manner'the rotation of the both drums 'jmaybe controlled The pawl 9 is as long as the drums are connected throughthe agency of the cable and are doing work. The details of constructionof this brake are not shown on the] drawings, because they form no partof the present invention.

I claim 1. In a hoist, the combination of a frame, a driving shaft, twodrums concentric with the driving shaft, a motor connected to operatethe driving shaft, opposed drivers carried by said drums respectively, amain driver rotated by the driving shaft, a pawl carried by the maindriver for automatically connecting said main driver to one or the otherof the said oppo-seddrivers in accordance with the direction of rotationof the driving shaft, and a guide member in engagement with said pawland adapted to insure the movement of said pawl.

2. In a hoist, the combination of a frame, a driving shaft, two drumsconcentric with the driving shaft, one drum being rotatable upon theother drum, a motor connected to operate the driving shaft, inner andouter concentric drivers carried by said drums respectively, a maindriver rotated by the driving shaft, a movablemember carried by the maindriver and located between the inner and outer drivers, means forautomatically actuating said movable member to connect the main driverto one or the other of the inner and outer drivers in accordance withthe direction of rotation of the driving shaft, and means independent ofsaid drivers for moving said movable member.

3. In a hoist, the combination of a frai'ne, a driving shaft, two drumsconcentric with the driving shaft, one drum being rotatable upon theother drum, a motor connected to operate the driving shaft, inner andouter concentric drivers carried by the said drums respectively, a maindriver rotated by the driving shaft, a pawl carried by the main driverand located between the inner and outer drivers, and means independentof said drivers for automatically actuating said pawl to connect themain driver to one or the other of the inner or outer drivers inaccordance with the direction of rotation of the driving shaft. v

4;. In a hoist, the combination of a frame, a driving shaft, a motorconnected to operate the driving shaft, a haulage drum and a tail ropedrum concentric with the driving shaft, an inner driver in the form of aring on the haulage drum having external teeth, an outer driver on thetail rope drum in the form of a concentric ring having internal teeth, amain driver rotated by the driving shaft, a radially movable pawlcarried by said main driver and adapted to engage the teeth of the inneror outer driver in accord ance with the direction of rotation of thedriving shaft, and a guide ring cooperating with said pawl for insuringthe movement of said pawl in either direction the driving shaft isrotated.

5, In a hoist, the combination of a frame, a driving shaft, two drumsrotatable relatively to the driving shaft, a motor connected to operatethe driving shaft, opposed drivers carriedby said drums respectively, amain driver connected to be rotated by the driving shaft, a pawl carriedwholly by the main driver remote from the driving shaft forautomatically connecting said main driver to one or the other of saidopposed drivers in accordance with the direction of rotation of thedriving shaft, and a guide member associated with said drums and adaptedto cooperate with said pawl for insuring the movement of said pawlrelative to each of said drivers.

6, In a hoist, the combination of a frame, a driving shaft, two drumsadapted to be driven alternately from the driving shaft, a motorconnected to operate the driving shaft, opposed drivers carried by saiddrums respectively, a main driver connected to be rotated by the drivingshaft, a pawl carried wholly by the main driver remote from the drivingshaft, a guide ringcontacting with said drums, and cooperative guidingmeans on said pawl and ring respectively for insuring the engagement ofsaid pawl with one or the other of said opposed drivers in accordancewith the direction of rotation of the driving shaft.

7. In a hoist, the combination of a frame, a driving shaft, two drumsadapted to be driven alternately from the driving shaft, a motorconnected to operate the driving shaft, opposed drivers for the drumsrespectively, a main driver for the drums, a pawl separate from butcarried wholly by the main driver remote from the driving shaft, a guidemember associated with said drums and adapted to cooperate with saidpawl for insuring the engagement of said pawl with one or the other ofsaid opposed drivers in accordance with the direction of rotation of thedriving shaft, and means tending to hold said guide member stationaryupon the reversal of the direction of rotation of said motor.

8. In a hoist, the combination of a frame, a driving shaft, two drumsadapted to be driven alternately from the driving shaft, a motorconnected to operate the driving shaft, opposed drivers for the drumsrespectively, a main driver for the drums, a pawl separate from butcarried wholly by the main driver remote from the driving shaft, a guidemember movable with said pawl and associated with said drums and adaptedto cooperate with said pawl for insuring the engagement of said pawlwith one or the other of said opposed drivers in accordance with thedirection of rotation of the driving shaft, and means for retarding YlOthe n1ove'1n'ent of said guide member when the direction of rotation ofthe driving shaft is reversed. r r

9. In a hoist, the combination of a frame, a 'drivi'ngshafft, two drumsrotatable about said driving shaft, and adapted to be driven alternatelytherefrom, a motor connected to operate the driving shaft, opposeddrivers for the drums respectively, a main driver to'r'the drums, aguide ring having a diago nal slot, an annular flange on said ringlocated between portions of said 'drums,'and a pawl carried by said maindriver and pro vided with a pin extending into the slot in said guidering, said pin and slot being adapted to cooperate to insure theengagement of said pawl with one or the other of said opposed drivers inaccordance with the direction of rotation of the driving shaft 10. In ahoist, the Combination ota frame; a driving "shaft, two drums rotatableabout the driving shaft a motor connected to operatethe driving shaft,opposed drivers carried by said drums respectively, a main driver-connected to be rotated by the drivin'g shaft, a movable member carriedby the main driver for automatically f connecting said main driver toone or the other of the said opposed driversin accordance with thedirection of rotation of the driving shaft, and means independent of theopposed drivers for actuating'said movable member into engagement withone or the other of said opposed drivers. v

11. In a hoist, the combination ofa frame, a driving shaft; 't'wo drumsrotatable about ing the driving shaft, a motor connected to opcrate thedrivingshaft, opposeddrivers carried by said drums respectively, a maindriverconnected'tobe rotated by the driving shaft, a movable membercarried by the main driver for automatically connecting said main driver'to one or the other of the said opposed "drivers in accordance with'the direction of rotation of the driving shaft, means independent ofthe opposed drivers for actuating'sai'd movable member intoengagem'entwith one or the other of said opposed drivers, and means tending to holdsaid actuating means stationary upon the reversal of the direction ofrotation of the motor. a

-12. In ahoist,'the combination of a frame, a driving shaft,twodrums'rotatable about the driving shaft, a motor connected to operatethe driving shaft, opposed drivers carried by the said drumsrespectively, a main driver connected to be rotated by thedriving'sh'aft, a pawl carried by the main driver for automaticallyconnecting said main ClIlVGl to one or the other of the said opposeddrivers in accordance with the direction of rotation ofthe drivingshaft, means independent of the opposed drivers for actuatin said pawlinto engagement with one or the other of said opposed drivers andfrictional means tending to hold said actuatmeans stationary upon thereversal of the direction of rotation of the motor.

In testimony whereof I have signed this specification.

EARL B. LEAR.

